efficiency1.txt
Last revised: 12/95

Grating     blazed grating at 19.5 degrees included angle             0.7
           (based on Loewen's published results for AD 17.5 degrees)

Lenses      14 air/glass interfaces with AR coating                   0.966
            (based on MG `V' coating, specified by Melles Griot
            at 0.25 % over 130A  bandwidth)

Lenses      bulk absorption in glass, 223~mm total path               0.92
           (published specs give 0.996 transmission through
           10mm for the worst case of chosen glass types

Total	    optical efficiency into both arms                         0.622